Theodore linke



(10 Model.)

T. LINKE; SELF CLEANING LIQUID FILTER.

No. 560,511. Patented May 19,1896.

WITNESSES.

A TTOHNE Y.

AN DREW B GRAHAM. FNOYOUTNQWASNINGTDND C UNITED STATES PATENT OFFICE.

THEODORE LINKE, OF NEV YORK, N. Y.

SELF-CLEANING LIQUID-FILTER.

SPECIFICATION forming part of Letters Patent No. 560,511, dated May 19, 1896. Application filed August 29, 1895. Serial No. 560,848. (No model.)

To all whom it may concern: 3 is a section on line 3 3 of Fig. 1. Fig. 4 is Be it known that LTHEODORE LINKE,a citia detail longitudinal section of the casing,

zen of the United States, and a resident of illustratingamodification,the centralportion New York city, countyand State of NewYork, of the casing and stone being broken out to 5 have inventeda new and useful Improvement shorten the figure.

in Self-Cleaning Liquid-Filters, of which the In all the figures the same reference-charfollowing is a specification. acters are used to designate the same parts.

My invention relates to that class of filters Referring first to Figs. 1, 2, and 3, A reprein which the water is passed through artificial sents the barrel or casing having one end fixed,

to or natural stone filtering medium which is preferably cast thereon, and the other end reincased in a metal barrel and in which'the movable. The fixed end is provided with a water may be passed through the filtering socket to receive the end or spindle I of the medium or may be caused to flow around it, tube upon which the filtering-stone is secured. in order that large quantities of unfiltered The adjustable end or cap 0 is secured by a :5 water may be drawn without removing the screw-thread and is provided with a stnffingfilter. box o,through which the tube E passes to carry The object of this present invention is to off filtered water. At opposite sides of about provide an improved device of this kind its center the barrel is provided with nipples through which filtered or unfiltered water in or necks CL and b, one for attaching the same 20 great quantities may be drawn by reason of to the faucet and the. other to receive the outthe large surface of filtering medium which let-cock B for unfiltered water.

may be employed. The filtering. medium is preferably a tube Another and the chief object of my present of porous natural stone D, through which is invention is to produce a filter of this type passed a metallic pipe E, having slots or per- 2 5 havingimproved self-cleaningmeans. Ihave forations 6 along its side, to enable the filfound by experience that the impurities held tered water to flow through and pass off in the water, when forced against the filterthrough the cook or outlet F. After the ing-stone or other medium of the ordinary stone tube is passed over the pipe the same devices of this class, are apt to lodge there is fixed in position by means of a shouldered 30 and thus retard the filtering of Water. It nut K, screwed on the pipe, awasherL being becomes necessary to remove the filtering interposed between said nut and stone and a medium and cleanse the same. Myinvention washer J being interposed between the stone is designed to avoid the necessity of such reand the shoulder of the spindle I, which latmoval by providing for cleaning the filter ter fits in the recess of the fixed end of the 35 without removing any part of it. This de barrel.

sirable object I obtain by locating in a con- The projecting end of the pipe is provided venient manner, between the filtering mewith internal lugs e, and a suitable coupling dium and the barrel, a scraper which scrapes or stufiing-box G clamps thereto one end of the face of the filtering medium when the the bent outlet-pipe F, which has a lug f pro- 40 latter is rotated. When the filtering medium jecting between the lugs e. To the .pipe F is revolved by means provided for the pur is affixed a wheel H in line with the center or pose, the impurities which have lodged on its axis of the pipe E, and by means of this face are scraped off and pass out when the wheel the pipe E is rotated, which causes the filter permits the passage of unfiltered water. lug f to engage one of the lugs e and rotate 45 To these ends my invention consists in the the pipe E and the stone for the purpose of construction and combination of parts subscraping off any impurities that may be 011 stantially as hereinafter described and the stone by the aid of the scraper N. This claimed. scraper is preferably made of thin but flexi- :00

In the accompanying drawings, Figure 1 is ble metal of the shape of the letter V. The

50 a longitudinal section of a filter embodying same is bent to conform to the stone, and is my improvements and attached to a faucet. fastened at the apex m on the interior of the Fig. 2 is a section on line? 2 of Fig. 1. Fig. barrel, and the other end is bent sharply inward to bring the edge against the filter. This edge covers the entire length of the stone. A washer N is placed at the end of the pipe E to prevent escape of filtered Water at that end.

Then it is desired to clean the filtering medium, it is only necessary to turn the wheel H. When the faucet is opened to draw unfiltered Water, it is only necessary to open the cock B, and when filtered Water is to be drawn the cock will be closed and the Water is forced through the filtering medium and through the openings in the pipe and out through the outlet-pipe F into any suitable receptacle.

Instead of afiixing the hand-wheel II as above described I may extend the spindle I through the end of the casing or barrel, as shown in Fig. 4, and provide it witha squared end vlto receive a turning key or wrench 0. With this construction the lugs f and e are dispensed with and a plain stuffing-box P is used in place of the coupling G".

Having now described my invention, what I claim is 1. The combination with the casing A, of the perforated pipe E carrying the filtering medium D and mounted to rotate in said casing, and the flexible scraper M consisting of a V-shaped sheet of flexible metal having its apex attached to the casing and having an inward bent free edge bearing on the said medium, substantially as described.

2. The combination with the casing A having a bearing-recess at one end and a cap having a stufiing-box at the other end, of the shouldered spindle I fitting said recess, the perforated pipe E secured at one end to said spindle and extending through the said stutting-box, and having lugs e the filter D secured on said pipe, a scraper in the space between the casing and filter, the bent outletpipe F having lug f and hand-wheel H, and the coupling G connecting the pipe F with the pipe E, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 16th day of August, 1895.

THEODORE LINKE.

lVitnesses:

FRANCIS A. CAMPBELL, CLAUDE .T. RICH. 

